SOLUTION: Sketch the graph of the function below. Please plot at least 5 points and show the complete solution. f(r)=r^2-2r

Question 1090822: Sketch the graph of the function below. Please plot at least 5 points and show the complete solution.
f(r)=r^2-2r
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
points
r=0, f(r)=0
1, -1
2, 0
3, 3
-2, 8
The roots are 0 and 2, and the function is 0 for both.
The intercept is (0, 0)
the vertex is at -b/2a, b=-2, a=1 or 2/2=1 and f (1)= -1, so the vertex is at (1, -1)
graph

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